Fallout New Vegas is all one game.
Not in a normal game
Nope. Fallout 3 and Fallout: New Vegas are completely different games, sure they are in the same title and the same game engine, but the configurations and in-outs are different for both games, so you cannot simply apply a mod you used for Fallout 3 and try to run it on Fallout: New Vegas. You may be able to find mods that match your Fallout 3 mods for New Vegas on an assortment of different websites all over the net.
no
I'm Afraid not. You'll have to wander the Mojave all over again
All of Fallout New Vegas' DLC's have been released; no more are in production. The DLCs are: -Dead Money -Old World Blues -Honest Hearts -Lomesome Road -Gun Runner's Arsenal -Courier's Stash If you want additional content for your game you could try out some mods. The majority of Fallout New Vegas Mods can be found in the related link.
Gary 999 does not exist. First of all; the Gary Vault (Vault 108) is in Fallout 3; not Fallout New Vegas. None of the Gary clones are even mentioned in New Vegas. Secondly, there is no (cannon) Gary 999. The highest (known) numbered Gary is Gary 54.
None of them. New Vegas came out long after all the Monty Python movies. Monty Python Holy Grail and a Monty Python skit (Hell's Grannies) are referenced in Fallout New Vegas, though.
A writer for Bethesda Studios was interviewed about this exact same question. He replied to them that all of the Fallout series writers agreed that there are just too many strong decisions that your character can make in Fallout New Vegas that it would be too much of a hassle and time consuming to create an add on for the game that keeps it going. In a way it makes sense if you have beat the game.
In Fallout 3, there was a site called "Fallout 3 Nexus", from what I understand it was where everyone went for mods. Similarly, one was made for New Vegas named "Fallout New Vegas Nexus". You'll be able to find all the mods you could ever hope for there (just google it). Be sure to download the Mod Manager, it makes mods easier to use.
He doesn't finish it.His laptop was stolen along with all his fallout data.
All around best gun for me would be 'This Machine'.
After you have completed all the missions for the Brotherhood of Steel you can purchase a fatman in their armory.